How to Do Keyword Research: Step-by-Step

Search intent is the reason behind a query. Google has invested billions in understanding intent, and its algorithms have become remarkably good at matching results to what users actually want. If your content doesn't match the dominant intent for a keyword, it won't rank regardless of how well it's optimized.

The Four Types of Search Intent

Informational intent covers queries where users want to learn something: "how to fix a leaky faucet" or "what is keyword research." Navigational intent is when users are looking for a specific website or brand: "Semrush login" or "YouTube." Commercial investigation intent involves users researching before a purchase: "best project management software" or "Ahrefs vs Semrush." Transactional intent signals readiness to buy or take action: "buy running shoes online" or "hire SEO agency."

How to Determine Intent

The simplest way to determine intent is to search the keyword yourself and analyze the top 10 results. Look at the content type (blog post, product page, comparison), the content format (listicle, how-to, review), and the content angle (beginner-focused, data-driven, updated for a specific year). If Google shows 10 blog posts for a keyword, your product page won't rank for it. Match the dominant format and intent, then differentiate on quality and depth.

Seed keywords are the broad terms that define your niche and serve as the starting point for deeper keyword research. Getting your seed list right determines the quality of everything that follows. Most businesses need 10-20 strong seed keywords that map to their core products, services, and topics.

Start With Your Business

List every product, service, and topic your business covers. Think about how customers describe what you do in their own words, which often differs from industry jargon. Review your sales team's call notes and support tickets for the exact language prospects use. Check your Google Analytics site search data to see what visitors are searching for on your site. This internal data is a goldmine for understanding real user vocabulary.

Mine Your Competitors

Enter your top 3-5 competitors into Ahrefs, Semrush, or a similar tool and export the keywords they rank for. Sort by traffic volume and look for terms where they rank in the top 20. These are keywords that are clearly relevant to your space and already proven to drive traffic. Pay special attention to keywords where multiple competitors rank but you don't, as these represent clear content gaps.

Use Google's Own Suggestions

Google Autocomplete, "People Also Ask" boxes, and "Related Searches" at the bottom of results pages are free keyword research tools. Start typing your seed terms and note what Google suggests. These suggestions are based on real search behavior and represent queries people actually type. Tools like AnswerThePublic and AlsoAsked.com aggregate these suggestions at scale.

Not all keywords are worth pursuing. A keyword with 10,000 monthly searches is useless if the top 10 results are all massive authority sites with thousands of backlinks. Keyword difficulty assessment prevents you from wasting months targeting terms you realistically can't rank for.

Understanding Keyword Difficulty Scores

Every major SEO tool provides a keyword difficulty (KD) score, typically on a 0-100 scale. However, these scores are calculated differently across tools and should be used as relative guidelines, not absolute truths. Ahrefs' KD is based primarily on the number of referring domains linking to top-ranking pages. Semrush factors in authority, content quality, and other signals. Always manually verify difficulty by looking at the actual SERPs rather than relying solely on a number.

Manual SERP Analysis

For each target keyword, examine the top 10 results and ask: What is the Domain Rating or Domain Authority of the ranking sites? How many referring domains point to each ranking page? How comprehensive and well-optimized is the content? Are there any lower-authority sites ranking, suggesting the keyword is achievable? If you see Reddit threads, forum posts, or thin content ranking in the top 10, that's a signal the keyword is less competitive than it appears.

Realistic Assessment

If your website has a Domain Rating of 30, targeting keywords where every top-10 result has a DR of 70+ and hundreds of backlinks is unlikely to pay off in the short term. Focus on keywords where at least 2-3 results come from sites with similar authority to yours, or where you can create significantly better content than what currently ranks.

Long-tail keywords are longer, more specific search queries that typically have lower search volume but higher conversion rates and less competition. While a head term like "SEO" gets 135,000 monthly searches, a long-tail variant like "SEO for small plumbing businesses" might only get 200, but the person searching it is far more likely to become a customer.

Why Long-Tail Keywords Matter

According to Ahrefs data, 94.7% of all keywords get fewer than 10 searches per month, and long-tail keywords collectively account for approximately 70% of all search traffic. These keywords are easier to rank for because fewer sites specifically target them. They also tend to have higher conversion rates because the searcher's intent is more specific and further along the buying journey. A page ranking for 500 long-tail keywords at 10 visits each generates the same traffic as ranking #1 for a head term with 5,000 monthly searches.

Finding Long-Tail Keywords

Use keyword research tools' question filters to find long-tail queries phrased as questions. Explore Google's People Also Ask boxes for related long-tail variations. Check your Google Search Console data for impressions on long queries you're already appearing for. Review competitor content and look for specific subtopics they cover that generate traffic. Tools like AnswerThePublic, Keyword Surfer, and the "Related terms" feature in Ahrefs are particularly effective for long-tail discovery.

Clustering Long-Tail Keywords

Group semantically related long-tail keywords together to target multiple variations on a single page. Google understands synonyms and related terms, so a well-optimized page can rank for dozens or hundreds of long-tail variations simultaneously. Use keyword clustering tools or manual grouping to identify which long-tail keywords can be consolidated into a single piece of content versus which need their own dedicated pages.

A keyword research project can easily produce hundreds or thousands of potential targets. Without a clear prioritization framework, teams end up chasing high-volume vanity keywords while ignoring achievable terms that could drive real business results. The best keyword strategies balance opportunity, difficulty, and business value.

The Priority Matrix

Score each keyword on three dimensions: search volume (how much traffic could it drive), keyword difficulty (how realistic is it to rank), and business value (how likely is a visitor to become a customer). Keywords that score high on business value and low on difficulty should be your immediate priorities, even if search volume is modest. High-volume, high-difficulty keywords go into your long-term roadmap. Low-value keywords, regardless of volume or difficulty, should be deprioritized or skipped entirely.

Mapping Keywords to Pages

Every target keyword needs a specific page assigned to it. Map your keywords to existing pages where possible, and identify gaps where new content needs to be created. Avoid keyword cannibalization by ensuring only one page targets each primary keyword. If multiple pages target the same keyword, consolidate them or differentiate their intent angles. Create a spreadsheet mapping each keyword to its assigned URL, target search intent, current ranking position, and priority tier.

Building Your Content Calendar

Translate your prioritized keyword list into a content calendar with specific deadlines and owners. Group related keywords into content clusters and plan them as a series. Prioritize content updates for pages that already rank on page two, as these are often the quickest wins. For new content, focus on long-tail and lower-difficulty keywords first to build topical authority before tackling competitive head terms.